Understanding COVID-19 in TK-12 Schools in Los Angeles County

  • Vaccines continue to offer effective protection against COVID-19. Unvaccinated children and youth continue to have higher case rates than those who are vaccinated in their same age groups. As of July 28, 2022, the 90-day rate of COVID-19 among youth aged 12-17 years in Los Angeles County was 2 times higher among those who were unvaccinated compared to those who were fully vaccinated.
  • School prevention strategies reduce transmission. Evidence has shown that a multipronged prevention strategy that includes masking, physical distancing, testing, isolation of identified cases and quarantining of exposed individuals, and vaccination can help to reduce COVID-19 transmission on campus. (See COVID-19 Case Rates in TK-12 School and in the Community, Los Angeles County)
  • Data dashboards are transparent and actionable. The TK-12 School Data dashboard provides dynamic, visual information to learn about the status of COVID-19 clusters in schools. This information can assist districts and schools to strengthen and target their COVID-19 prevention measures to ensure that schools remain a safe environment for students, teachers, and staff.


  • A cluster is defined as 3 or more COVID-19 cases among students, teachers, and/or staff within a classroom, office, or other pre-defined or identifiable group who were on campus at any point within the 14 days prior to illness onset date. COVID-19 clusters are reported to Public Health from TK-12 Schools and Youth Programs and may have epidemiological links. Clusters do not necessarily represent outbreaks. Public Health investigates these reported clusters and confirms epidemiological linkages to determine if the outbreak criteria have been met.
  • Cases include laboratory confirmed cases and unconfirmed cases (e.g., positive results from over the counter or at-home tests) reported to Public Health.
  • Data may differ from information managed at the district- or school-level due to the reporting time period and data quality control conducted by Public Health staff.
  • Data are refreshed every Wednesday and reflect data from Monday to Sunday from the prior week. Due to updates and reporting delays, counts may change in future reports.
  • If you have any questions, please contact acdc-education@ph.lacounty.gov.


COVID-19 Clusters in TK-12 Schools

New COVID-19 Clusters Reported in the Past 7 Days by TK-12 Schools and Programs, with COVID-19 Community Vaccination or Case Rates, 05 Sep 2022 - 11 Sep 2022

The maps below show new COVID-19 clusters reported in the past 7 days.

  • TK-12 schools are required to report all clusters of 3 or more COVID-19 cases who were on campus within 14 days of their illness onset date to Public Health.
  • Schools with a cluster of 3 or more new cases in the past 7 days do not reflect school outbreaks unless posted in the outbreak table below.
  • Cluster associated cases may include individuals who reside outside of Los Angeles County but attend, are employed by, or visited a school/program in Los Angeles County.
  • Community COVID-19 case rates by school district are calculated as the 7-day average number of COVID-19 cases residing within a Los Angeles County school district boundary divided by the population residing within the school district boundary per 100,000 persons. Residence is based on reported home address.
  • Community vaccination by school district is calculated as the percentage of vaccine eligible children aged 5-11 years and 12-18 years who resided within a Los Angeles County school district boundary based on their reported home address and received at least one dose of vaccine.
  • Vaccination estimates of “Over 95%” indicate that population vaccination coverage metrics are capped at 95%.
  • Data reported on COVID-19 clusters and cluster associated cases may differ from the information managed at the district- or school-level due to the reporting time period and additional quality control conducted by Public Health staff.
  • Pasadena and Long Beach cases are reported directly to their local health departments.


COVID-19 Outbreaks in TK-12 Schools

A COVID-19 outbreak in TK-12 schools or programs serving school-aged children is opened when there are at least 3 or more laboratory-confirmed cases of COVID-19 within a 14-day period of each other in a specific group with members who are epidemiologically-linked, do not share a household, and are not a close contact of each other outside of the school. Total number of student and staff cases may include non-confirmed cases (e.g. cases that tested positive via over-the-counter or at-home tests). Out of over 3,000 schools in LA County, only a small fraction have COVID-19 outbreaks. Those that do are assisted by Public Health to mitigate spread.

Active COVID-19 Outbreaks in TK-12 Schools and Youth Programs by Outbreak Site, Cases, and Contacts, Los Angeles County Department of Public Health, Data through 11 Sep 2022

Site Date Outbreak Opened Outbreak Type # Student Cases # Staff Cases # Student Close Contacts # Staff Close Contacts
Abraham Joshua Heschel Day School 2022-09-08 Classroom 15 1 37 2
Abraham Lincoln Elementary 2022-09-08 Classroom 4 1 22 0
Amargosa Creek Middle 2022-09-01 Classroom 21 0 0 0
Anaverde Hills 2022-08-15 Classroom 58 1 0 0
Birmingham Community Charter High 2022-09-06 Camp/Non-TK-12 Program 19 5 0 0
Canyon High School 2022-09-02 Classroom 7 0 0 0
COEUR D ALENE AVENUE ELEMENTARY 2022-09-06 Classroom 6 1 17 0
Duarte High 2022-09-08 Camp/Non-TK-12 Program 5 0 37 0
East Whittier Middle School 2022-09-02 Classroom 7 0 0 0
Fenton Avenue Charter - Lake View Terrace 2022-09-01 Classroom 14 1 0 0
Fulton and Alsbury Academy of Arts and Engineering - Lancaster 2022-08-19 Classroom 18 0 0 0
Gabrielino High 2022-09-09 Camp/Non-TK-12 Program 9 0 14 0
Golden Valley High School - Santa Clarita 2022-08-22 Other 59 1 0 0
Granada Hills Charter High School 2022-09-09 Classroom 6 0 0 0
Granada Hills Charter TK-8 Campus - Northridge 2022-09-02 Classroom 6 0 0 0
Granada Middle 2022-08-31 Classroom 18 0 0 0
Highland Oaks Elementary 2022-09-09 Classroom 8 1 0 49
Holy Family High School 2022-09-06 Camp/Non-TK-12 Program 7 0 17 1
iLEAD Lancaster Charter 2022-08-30 Classroom 20 1 0 0
Jack Northrop Elementary, Lancaster 2022-08-17 Classroom 22 0 0 0
John Burroughs High School - Burbank 2022-09-06 Camp/Non-TK-12 Program 5 0 0 0
La Canada Elementary 2022-09-08 Classroom 12 0 0 0
LAUSD Headquarters (Beaudry office) 2022-08-24 Other 0 71 0 100
Loma Vista Elementary - Whittier 2022-09-08 Classroom 12 1 0 0
Nelson Elementary School - La Puente 2022-08-19 Classroom 14 0 0 0
North Ranchito Elementary School 2022-09-08 Classroom 4 0 0 0
Parras (Nick G.) Middle 2022-08-31 Classroom 31 4 0 0
Pinewood Avenue Elementary 2022-08-26 Classroom 13 3 0 0
PUC Community Charter Elementary - Sylmar 2022-09-01 Classroom 7 0 0 0
Ramona Elementary - Bellflower 2022-08-24 Classroom 8 1 0 0
Rancho Pico Junior High - Stevenson Ranch 2022-08-19 Classroom 25 0 0 0
San Antonio Elementary 2022-09-07 Classroom 6 1 24 0
Sierra Vista High 2022-08-25 Camp/Non-TK-12 Program 7 0 10 0
Sierra Vista Junior High 2022-08-30 Classroom 13 0 0 0
Soleado Elementary 2022-09-09 Classroom 5 0 25 0
St. Monica Catholic High School - Santa Monica 2022-08-31 Camp/Non-TK-12 Program 7 0 0 0
Sylmar Leadership Academy 2022-09-09 Other 7 1 21 0
The Webb Schools - Claremont 2022-09-06 Other 47 0 0 0
Towers Elementary 2022-09-07 Classroom 4 0 0 0
Vista San Gabriel Elementary 2022-08-12 Classroom 4 3 0 0
Walter Reed Middle School 2022-09-09 Classroom 16 0 0 0
West Ranch High 2022-09-02 Camp/Non-TK-12 Program 20 0 0 0
William S. Hart High - Newhall 2022-08-26 Camp/Non-TK-12 Program 5 0 0 0
Wittmann (Helen) Elementary - Cerritos 2022-09-09 Classroom 3 0 0 0
  • Epidemiologically-linked means that the cases were present at some point in the same setting during the same time while infectious.
  • Outbreaks that are active means that there has been at least one COVID-19 case that is epidemiologically-linked to the outbreak cluster within the past 10 days.
  • “Camp/Non-TK-12 Program Outbreak” types include all day camp, overnight camp, youth sports, and non TK-12 program outbreaks.